16-07-2014
Mathematics

contestada

Perform the indicated operation and write and standard form. -7i(6i-3)

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konrad509 konrad509

16-07-2014

[tex]-7i(6i-3)=\\ -42\cdot(-1)+21i=\\ 42+21i[/tex]

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16-07-2014

-7i (6i - 3)

Perform the distributed multiplication to eliminate the parentheses:

-7i (6i) - 7i (-3) = -42i² + 21i

IF i = √-1 , then the expression is equal to (42 + 21i) or 21(2 + i) .

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